As you can probably tell by the title, this book explains what you need to know about dates and times in computing. Its sole purpose is to quickly get you up to speed on this ubiquitous and commonly misunderstood topic. This is the first in a series of Cromulent Guides. We produce concise, easy to read guide(s) about technical topics. The size of each guide is about the same as a chapter from a normal book, so you only have to buy what you need. Never judge a book by its description.